Join Date: Dec 2002
Location: Doncaster, England
I have checked the box mine came in and there was nothing on it about gap setting. Mine were Iridium plugs though and I know for definately that you must not adjust the gap.
I might be wrong about the platinum plugs but if you are fitting new plugs the gap does not need setting as it is already set by the manufacturer. Another reason you shuld not adjust the gap on new plugs is that different manufacturers use different materials in their plugs and so they set their gaps differently to compensate.
If they are old plugs the service life is such that by the time they are worn out they should be replaced and not re-gapped.
That's the great thing about the modern platinum and iridium spark plugs. They last so long and give such good performance, gone are the days of checking plugs every 6 months and replacing them every 1 or 2 years. Some can even last for up to 120,000 miles.
1999 156 2.5 V6 SP3 Veloce Proteo Red 17" 15 Spoke White Alfa Alloys Eibach Pro Kit Springs/Dampers Powerflow Stainless Exhaust